fix(vitest): explicitly error when browser-mode is enabled (#4243)

- Clearly state that the `@stryker-mutator/vitest-runner` doesn't support browser mode yet.
- Opt for [task metadata](https://vitest.dev/advanced/metadata.html) instead of file communication.
- Set minimal support `vitest` version to `0.31.2`, because of the task metadata support.

e2e/package.json

@@ -44,7 +44,7 @@
     "ts-jest": "29.0.5",
     "ts-loader": "9.4.3",
     "ts-node": "10.9.1",
-    "vitest": "0.31.1",
+    "vitest": "0.31.2",
     "typescript": "5.0.4",
     "webpack": "5.84.1",
     "webpack-cli": "5.1.1"